| 考虑粘性土体低速非Darcy渗流地面沉降模拟的探讨 |
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| 引用本文： | 胡成,陈刚,丁国平.考虑粘性土体低速非Darcy渗流地面沉降模拟的探讨[J].水文,2012(4):8-12,96. |
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| 作者姓名： | 胡成 陈刚 丁国平 |
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| 作者单位： | 中国地质大学环境学院 |
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| 基金项目： | 中国地质调查局项目“华北平原地面沉降调查与监测综合研究”(1212010540906) |
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| 摘 要： | 过度抽汲地下水引发的地面沉降是全球广泛关注的地质环境问题。对其进行数值模拟是实现地面沉降灾害科学管理的最有效手段。水流模型是地面沉降模型的必要组成部分,对其刻画得准确与否将影响沉降模拟的准确度。本文首先综述了低渗透性粘性土体中的低速非线性Darcy渗流规律,而后从地面沉降发生的地质背景分析出发,论证了低速非线性Darcy渗流对地面沉降模拟的作用,并讨论了当前地面沉降模拟中水流模型刻画的不足之处。最后提出了如何在地面沉降模拟中考虑低速非Darcy渗流的4个关键性科学问题,对该问题的探讨有助于提高地面沉降模拟的准确性。
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| 关 键 词： | 地面沉降 水流模型 低速非Darcy流 |
Discussion on Land Subsidence Numerical Simulation Considering Low-velocity Non-Darcy Flow in Clayish Interbeds |
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| HU Cheng,CHEN Gang,DING Guoping.Discussion on Land Subsidence Numerical Simulation Considering Low-velocity Non-Darcy Flow in Clayish Interbeds[J].Hydrology,2012(4):8-12,96. |
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| Authors: | HU Cheng CHEN Gang DING Guoping |
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| Institution: | (School of Environmental Studies,China University of Geosciences,Wuhan 430074,China) |
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| Abstract: | Land subsidence due to excessive groundwater exploitation is an attention-getting envi ronmental hazard all over the world.Establishing a numerical model is a most effective approach to the reasonable management of geohazard.Groundwater flow model,an essential part of land subsidence model,has a very important impact on the accuracy of subsidence simulation result.This paper firstly reviewed the existence of low-velocity non-Darcy flow in the clayish aquitards or interbeds.Subsequently on the basis of the analyst of geo-environmental background to subsidence,the necessity of non-Darcy flow to subsidence simulation was elucidated.Meantime,a concernful defect of groundwater flow simulation in related current literatures was emphasized.Finally,4 key scientific questions were advanced for how to take low-velocity non-Darcy flow in the land subsidence numerical simulation. |
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| Keywords: | land subsidence groundwater flow model low-velocity non-Darcy flow |
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